Mounting, installation GB and operating manualäktar.se/wp-content/uploads... · 2017. 9. 20. ·...

EHC20

Mounting, installation and operating manual

GB

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A. Product information . . . . . . . . . . . . . . . 4

A.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 4

A.2 About the controller . . . . . . . . . . . . . . . . . . 4

A.3 Items supplied . . . . . . . . . . . . . . . . . . . . . . . 4

B. Controller description . . . . . . . . . . . . . . 5

B.1 Technical data. . . . . . . . . . . . . . . . . . . . . . . . 5

C. Installation . . . . . . . . . . . . . . . . . . . . . . . . 6

C.1 Wall mounting . . . . . . . . . . . . . . . . . . . . . . . 6

C.1.1 Housing base. . . . . . . . . . . . . . . . . . . . . . . 6

C.1.2 Housing top . . . . . . . . . . . . . . . . . . . . . . . . 7

C.2 Electrical connection . . . . . . . . . . . . . . . . . 7

C.3 Installing the temperature sensors:. . . . 8

D. Terminal plan and connections . . . . . 9

D.1 Terminal box . . . . . . . . . . . . . . . . . . . . . . . . . 9

D.2 Terminal plan for electrical connections 9

D.3 Hydraulic variants / overview / systems 10

E. Connection diagrams . . . . . . . . . . . . . 12

E.1 Program 6.1.1. Heat exchanger without

bypass damper. With one storage tank.. . . 12

E.2 Program 6.1.2. Heat exchanger without

bypass damper. With two storage tanks. . . 14

E.3 Program 6.1.3 Heat exchanger without by-

pass damper. With one storage tank and a mixer.

16

E.4 Program 6.1.4. Heat exchanger without by-

pass damper. With two storage tanks and a mixer.

18

E.5 Program 6.1.5. Heat exchanger with bypass

damper. With one storage tank. . . . . . . . . . . 20


damper. With two storage tanks. . . . . . . . . . 22


damper. With one storage tank and a mixer. 24


damper. With two storage tanks and a mixer. 26

E.9 Program 6.1.1. Heat exchanger with VFS sen-

sor for power measurement. . . . . . . . . . . . . . 28

F. Operation . . . . . . . . . . . . . . . . . . . . . . . . 30

F.1 Display and entry system . . . . . . . . . . . 30

F.2 Setup wizard . . . . . . . . . . . . . . . . . . . . . . . 30

F.3 Unassisted setup . . . . . . . . . . . . . . . . . . . 31

F.4 Menu sequence and structure . . . . . . 31

1. Measurements . . . . . . . . . . . . . . . . . . . 32

2. Statistics . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.1 Operating hours. . . . . . . . . . . . . . . . . . . . . 33

2.2 Heat quantity . . . . . . . . . . . . . . . . . . . . . . . 33

2.3 Graphic overview. . . . . . . . . . . . . . . . . . . . 33

2.4 Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.5 Reset / delete . . . . . . . . . . . . . . . . . . . . . . . 33

3. Operating mode . . . . . . . . . . . . . . . . . . 33

3.1 Automatic. . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3.2 Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3.3 Of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4. Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.1 Tmin S (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.2 Tmax S (X). . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.3 Priority S(X) . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.4 T priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.5 Filling time . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.6 Temperature rise . . . . . . . . . . . . . . . . . . . . 35

5. Protective functions . . . . . . . . . . . . . . 35

5.1 Anti-seize protection . . . . . . . . . . . . . . . . 35

6. Special functions . . . . . . . . . . . . . . . . . 36

6.1 Program selection . . . . . . . . . . . . . . . . . . . 36

6.2 Rotational speed control. . . . . . . . . . . . . 36

6.2.1 Rotational speed modes . . . . . . . . . . . 36

6.2.2 Pump type . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3 Pump settings . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.1 Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.2 Signal form . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.3 PWM of . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.4 PWM on . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.5 PWM max. . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.6 0-10V of. . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.7 0-10V on. . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3.8 0-10V max . . . . . . . . . . . . . . . . . . . . . . . 38

6.2.3.9 Rotational speed when "On". . . . . . 38

6.2.3.10 Show signal. . . . . . . . . . . . . . . . . . . . . . 38

6.2.4 Purging time . . . . . . . . . . . . . . . . . . . . . . 39

6.2.5 Control time . . . . . . . . . . . . . . . . . . . . . . . 39

6.2.6 Max. rotational speed . . . . . . . . . . . . . . 39

6.2.7 Min. rotational speed . . . . . . . . . . . . . . 39

6.2.8 Setpoint value . . . . . . . . . . . . . . . . . . . . . 40

6.3 R2 rotational speed control . . . . . . . . . . 40

6.4 Relay functions . . . . . . . . . . . . . . . . . . . . . . 40

6.4.1 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . 40

6.4.1.1 TH setpoint . . . . . . . . . . . . . . . . . . . . . . 40

6.4.1.2 TH hysteresis. . . . . . . . . . . . . . . . . . . . . 40

6.4.1.3 Thermostat sensor 1 . . . . . . . . . . . . . 40

6.4.1.4 Thermostat sensor 2 . . . . . . . . . . . . . 41

6.4.1.5 T eco . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.4.1.6 Storage tank . . . . . . . . . . . . . . . . . . . . . 41

6.4.1.7 Economy mode . . . . . . . . . . . . . . . . . . 41

6.4.1.8 Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.4.2 Thermostat 2 . . . . . . . . . . . . . . . . . . . . . . 41

6.4.3 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.4.3.1 Co Tsetpoint . . . . . . . . . . . . . . . . . . . . . 41

6.4.3.2 Co hysteresis. . . . . . . . . . . . . . . . . . . . . 41

6.4.3.3 Cooling sensor . . . . . . . . . . . . . . . . . . . 42

6.4.3.4 Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.4.4 Return low temperature rise . . . . . . . 42

6.4.4.1 RF Tmax . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.4.4.2 ∆T return low. . . . . . . . . . . . . . . . . . . . 42

6.4.4.3 Return low sensor . . . . . . . . . . . . . . . 42

6.4.4.4 Storage tank sensor . . . . . . . . . . . . . . 42

6.4.5 Anti-Legionella function . . . . . . . . . . . 42

6.4.5.1 AL Tsetpoint . . . . . . . . . . . . . . . . . . . . . 42

6.4.5.2 AL action time . . . . . . . . . . . . . . . . . . . 43

6.4.5.3 Last AL heating . . . . . . . . . . . . . . . . . . 43

6.4.5.4 AL sensor 1 . . . . . . . . . . . . . . . . . . . . . . 43

6.4.5.5 AL sensor 2 . . . . . . . . . . . . . . . . . . . . . . 43

6.4.5.6 AL times . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.4.6 Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.4.6.1 ∆ T transfer . . . . . . . . . . . . . . . . . . . . . . 43

6.4.6.2 Tr Tmax . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.4.6.3 Tr Tmin . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.4.6.4 Source sensor. . . . . . . . . . . . . . . . . . . . 44

6.4.6.5 Destination sensor . . . . . . . . . . . . . . . 44

6.4.7 Diference . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.4.7.1 ∆ T diference . . . . . . . . . . . . . . . . . . . . 44

6.4.7.2 Source sensor. . . . . . . . . . . . . . . . . . . . 44

6.4.7.3 Dif Tmin. . . . . . . . . . . . . . . . . . . . . . . . . 44

6.4.7.4 Destination sensor . . . . . . . . . . . . . . . 44

6.4.7.5 Dif Tmax . . . . . . . . . . . . . . . . . . . . . . . . 44

6.4.8 Solid fuel boiler . . . . . . . . . . . . . . . . . . . . 45

6.4.8.1 SF Tmin . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.4.8.2 SF Tmax. . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.4.8.3 ∆ T SF . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.4.8.4 Boiler sensor . . . . . . . . . . . . . . . . . . . . . 45

6.4.8.5 Storage tank sensor . . . . . . . . . . . . . . 45

6.4.9 Error messages . . . . . . . . . . . . . . . . . . . . 45

6.4.10 Pressure control . . . . . . . . . . . . . . . . . . . 46

6.4.10.1 Pressure control. . . . . . . . . . . . . . . . . . 46

6.4.10.2 RPS1 / RPS2 . . . . . . . . . . . . . . . . . . . . . . 46

6.4.10.3 Pmin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.4.10.4 Pmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.4.11 Booster pump . . . . . . . . . . . . . . . . . . . . . 46

6.4.11.1 Filling time. . . . . . . . . . . . . . . . . . . . . . . 46

6.4.12 Parallel operation R (X) . . . . . . . . . . . . . 46

6.4.12.1 Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.4.12.2 Follow-up time. . . . . . . . . . . . . . . . . . . 47

6.4.13 Parallel operation R2 . . . . . . . . . . . . . . . 47

6.4.14 Permanently on . . . . . . . . . . . . . . . . . . . 47

6.4.15 Heating circuit . . . . . . . . . . . . . . . . . . . . . 47

6.4.15.1 Room setpoint day . . . . . . . . . . . . . . . 47

6.4.15.2 Room setpoint night . . . . . . . . . . . . . 47

6.4.15.3 Room sensor. . . . . . . . . . . . . . . . . . . . . 47

6.4.15.4 Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.5 Heat quantity . . . . . . . . . . . . . . . . . . . . . . . 48

6.5.1 Forward low sensor (X) . . . . . . . . . . . . 48

6.5.2 Return low sensor. . . . . . . . . . . . . . . . . 48

6.5.3 Glycol type . . . . . . . . . . . . . . . . . . . . . . . . 48

6.5.4 Proportion of glycol. . . . . . . . . . . . . . . . 48

6.5.5 Forward throughlow (X) . . . . . . . . . . . 48

6.5.6 Ofset ∆T . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.5.7 VFS (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.5.8 VFS position . . . . . . . . . . . . . . . . . . . . . . . 49

6.5.9 Reference sensor . . . . . . . . . . . . . . . . . . 49

6.6 Pressure monitoring . . . . . . . . . . . . . . . . . 49

6.6.1 Pressure monitoring . . . . . . . . . . . . . . . 49

6.6.1.1 RPS1 / RPS2 . . . . . . . . . . . . . . . . . . . . . . 49

6.6.1.2 Pmin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.6.1.3 Pmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

6.7 Sensor calibration . . . . . . . . . . . . . . . . . . . 49

6.8 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.9 Factory settings . . . . . . . . . . . . . . . . . . . . . 50

6.10 SD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.10.1 Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.10.2 Free storage space . . . . . . . . . . . . . . . . . 50

6.10.3 Load coniguration . . . . . . . . . . . . . . . . 50

6.10.4 Save coniguration. . . . . . . . . . . . . . . . . 50

6.10.5 Firmware update . . . . . . . . . . . . . . . . . . 50

6.10.6 Eject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.11 Time and date . . . . . . . . . . . . . . . . . . . . . . . 51

6.12 Summer time . . . . . . . . . . . . . . . . . . . . . . . 51

6.13 Power saving mode . . . . . . . . . . . . . . . . . 51

6.14 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.14.1 Ethernet. . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.14.2 MAC address . . . . . . . . . . . . . . . . . . . . . . 51

6.14.3 TCP/IP address. . . . . . . . . . . . . . . . . . . . . 51

6.14.4 Network mask . . . . . . . . . . . . . . . . . . . . . 51

6.14.5 Gateway. . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.14.6 Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.15 Temperature unit . . . . . . . . . . . . . . . . . . . . 51

7. Menu lock . . . . . . . . . . . . . . . . . . . . . . . . 52

8. Service Data . . . . . . . . . . . . . . . . . . . . . . 52

9. Language . . . . . . . . . . . . . . . . . . . . . . . . 52

G. Faults with error messages . . . . . . . . 53

G.1 Replace fuse . . . . . . . . . . . . . . . . . . . . . . . 53

G.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . 54

H. Useful information / tips and tricks 55

I. EU Declaration of Conformity . . . . . . 56

3110086 EHC20 UK 1606142

Legend for symbols: The following symbols are used throughout the manual as warnings. They indicate potential hazards or refer to important information relating to the product.

Prohibitory symbol: Failure to observe information marked with a prohibitory symbol can result in serious injuries – or even death!

Hazard symbol: Failure to observe information marked with a hazard symbol can result in injuries and/or damage to the device.

Attention symbol: Information that is particularly important for the functioning and optimum use of the device and the system.

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCKS OR PERSONAL INJURIES, THE FOLLOWING RULES MUST BE OBSERVED:

• The device should only be used in the manner speciied by the manufacturer. If you have any questions, please contact the manufacturer. The address and telephone number of the manufacturer can be found in the list at the end of this manual.

• Before maintaining or cleaning the device, switch it of at the service panel and lock the service panel so that it cannot be turned on again accidentally.

• Installation work and work on the electrical connections should be carried out by specialists in accordance with the laws and regulations in place.

• Observe the device manufacturer's guidelines and safety regulations as well as the oicial provisions in force in the particular country.

• The device must be earthed.

No special requirements. The device must be disposed of in accordance with the oicial provisions concerning the disposal of electronic waste.

3110086 EHC20 UK 160614 3

A. Product information

A.1 Description

The controller was produced and tested in accordance with strict quality and safety requirements. The legal warranty period of two years from the date of sale applies to the device.However, the manufacturer shall accept no liability or warranty claims for personal injuries and damage to property resulting from one or more of the following:

• Failure to observe these mounting and operating instructions• Incorrect mounting, setup, maintenance and operation• Improper repairs• Unauthorized modiications to the device• Installation of additional components that were not tested together with the device• All damages resulting from continued use of the device in spite of an obvious defect• Failure to use original spare parts and accessories• Use of the device in an unintended manner• Failure to observe the limit values set out in the technical data• Force majeure

A.2 About the controller

The EHC temperature diferential controller helps you to use your heating system and control its functions eiciently. The device has an impressive range of functions and is virtually self-explanatory in use. The individual entry buttons have speciic functions and are explained in the context of each step. In the controller menu, you will ind not only keywords but also help texts and clear graphics relating to the measurements and settings.The EHC can be used as a temperature diferential controller for various types of systems . These are illustrated and explained from page 10 onwards.Key features of the EHC:

• Illuminated display showing graphics and texts• Straightforward querying of current measurements• Various options for evaluating and monitoring the system, e.g. graphical statistics• Extensive settings menus with explanations• Menu lock function to prevent accidental changes• Reset option for restoring previous values or factory settings• Various additional functions are optionally available

A.3 Items supplied

• EHC temperature diferential controller• 3 screws (3.5 x 35 mm) and 3 plugs (6 mm) for wall mounting• 12 strain relief clamps with 24 screws, replacement fuses 1x T2 A / 250 V• Micro SD card• EHC mounting and operating manual

Optionally supplied depending on model/order:• Pt1000 temperature sensors and thermowells• Ethernet connection

Also available:• Pt1000 temperature sensors, thermowells, overvoltage protection• CAN bus data logger

4 • Product information 3110086 EHC20 UK 160614

B. Controller description

B.1 Technical data

Electrical data:Mains voltage 100 - 240 VACMains frequency 50 - 60 HzPower consumption 0.5 - 3 WSwitching powerTotal electronic relay switching power: 460 VA for AC1 / 240 W for AC3 Electronic relay R1 Min. 5 W...max. 120 W for AC3 Electronic relay R2 Min. 5 W...max. 120 W for AC3 Total mechanical relay switching power: 460 VA for AC1 / 460 W for AC3 Mechanical relay R3 460 VA for AC1 / 460 W for AC3 Mechanical relay R4 460 VA for AC1 / 460 W for AC3 Mechanical relay R5 460 VA for AC1 / 460 W for AC3 Mechanical relay R6 460 VA for AC1 / 460 W for AC3

Potential-free relay R7 460 VA for AC1 / 185 W for AC3

0..10V output Designed for 10 kΩ load resistance PWM output Freq. 1 kHz, level 10 V

Internal fuse 2A slow-blow 250 V (3x)

Protection type IP40Protection class IIOvervoltage category IIPollution level II

Sensor inputs 8 x Pt1000 2 x Grundfos direct sensors 1 x RC21Measuring range PT1000 -40°C to 300°C Grundfos direct sensor: 0°C - 100°C (-25°C / 120°C briely)

VFS 1 l/min - 12 l/min (VFS1-12) RPS 0 - 0.6 bar2 l/min - 40 l/min (VFS2-40) 0 - 1 bar5 l/min - 100 l/min (VFS5-100) 0 - 1.6 bar10 l/min - 200 l/min (VFS10-200) 0 - 2.5 bar

0 - 4 bar0 - 6 bar0 - 10 bar

Permitted total cable lengths:Sensors S7 and S8

C. Installation

C.1 Wall mounting

1. Completely loosen the cover screw

2. Carefully remove the terminal box cover from the bottom section. Loosen the two screws in the top section and remove the top section from the base.

3. Mark the three ixing holes (see "C.1.1 Housing base"). Make sure that the wall surface is as lat as possible to prevent the housing distorting when the screws are tightened.

4. Using a drill and a size 6 mm bit, drill three holes in the wall at the points marked and insert the plugs.

5. Mount the controller from the top screw.

6. Insert the two bottom screws and tighten them.

Install the controller only in rooms that are dry and meet the environmental requirements set out in "B.1 Technical data".

The controller must not be accessible from behind.

C.1.1 Housing base

161

11,8

195,4

9

R4.5

4.4

3333

139,3

n3.5

169.3

6 • Installation 3110086 EHC20 UK 160614

C.1.2 Housing top

Terminal box cover

Cover screw

C.2 Electrical connection

Before working on the device, disconnect the power supply and ensure that the device cannot be switched on again! Check that the power is switched of. The electrical connection work should only be carried out by a specialist in accordance with the regulations in place. The controller must not be used if there is visible damage to the housing, e.g. cracks.

Extra low voltage leads such as temperature sensor leads should be kept away from the mains cables. Temperature sensor leads should only be inserted into the left-hand side and mains cables only into the right-hand side of the device.

An omnipolar cut-of device, e.g. an emergency heating switch, should be itted to the power supply system for the controller by the customer.

No more than 55 mm of the sheath on the leads that are to be connected to the device should be stripped, and the sheath should reach just beyond the strain relief clamp where the cable enters the housing.

The controller and VFS sensor must have the same ground potential. The VFS sensor has a functional earthing system (PELV). The controller's PE terminal must be connected to the pipe system close to the sensor.

Installation• 73110086 EHC20 UK 160614

C.2.1

1. Select the required program/hydraulic system (see "D.3 Hydraulic variants / overview / systems", page 10)

2. Open the terminal box cover ("D.1 Terminal box", page 9)

3. Strip no more than 55 mm of the cable sheath, insert cables, attach the strain relief clamps, strip 8-9 mm of the insulation of the ends of the wires (Fig. ”C.2.1”)

4. Open the terminals using a suitable screwdriver (Fig. ”C.2.2”) and connect the power supply to the controller

5. Replace the terminal box cover and secure it with the screw

6. Switch on the mains power and begin using the controller

C.2.2

Instructions for terminals:

1. Insert a suitable screwdriver into the top opening and push the locking bar downwards. Keep the screwdriver in this position.

2. Insert the cable into the bottom opening.

3. Remove the screwdriver.

C.3 Installing the temperature sensors:

The controller works with Pt1000 temperature sensors. These measure the temperature extremely accurately and thus ensure that the system functions optimally from a control point of view.

The temperature sensor leads should be kept separate from the mains power cables and must for example not be routed through the same cable channel.

Position the sensors exactly in the area to be measured! Use only the immersion pipe or lat-mounted sensor with the appropriate permitted temperature range for the particular application.

If necessary, the sensor lead connected to S7/S8 can be extended to a maximum length of 30 m using a cable at least 0.75 mm² in size. The sensor leads connected to S1 to S6 can be extended to a maximum length of 10 m using a cable at least 0.75 mm² in size.

When connecting the cables, ensure that no transition resistances occur.

The VFS direct sensors should be connected using the appropriate plugs. To avoid damaging the direct sensors, it is recommended that you position them only in the return low.

When mounting the direct sensor (VFS), the correct low direction must be observed.

8 • Installation 3110086 EHC20 UK 160614

D. Terminal plan and connections

D.1 Terminal box

The mains section on the right-hand side of the terminal box is protected by an additional plastic panel.Before removing this, ensure that the controller has been disconnected from the power supply.

Bridge

D.2 Terminal plan for electrical connections

V2 V1 S8 S7

VFS2RC VFS1

SD Card

Ethernet

S6 S5 S4 S3 S2 S1 GND R6NC C NO R5 R4 R3 R2 R1 N L

MainsRelaysPF relaysExtra low voltages

Max. 12 V

Extra low voltages Max. 12 VAC/DC

Terminal: Connection for:S1 Sensor 1S2 Sensor 2 S3 Sensor 3S4 Sensor 4S5 Sensor 5S6 Sensor 6S7 Sensor 7S8 Sensor 8

V1 0-10 V / PWM V2 0-10 V / PWM

VFS1 Grundfos direct sensorVFS2 Grundfos direct sensor

RC Room controller

SD card slot

for data storage and updates

Ensure that the card is the right way around! The card should lock with no resistance, do not use excessive force!

Ethernet (optional)For connecting to a LAN

Potential-free relay

NONormally open(closer)

CCommon(voltage)

NCNormally closed(opener)

Mains 230 VAC

Mains voltages 230 VAC 50-60 Hz

Terminal: Connection for:R1 Switch output 1 (rot. sp.)R2 Switch output 2 (rot. sp.)R3 Switch output 3R4 Switch output 4R5 Switch output 5R6 Switch output 6

N Mains neutral wire NL Mains live wire L

The PE earth wire should be connected to the PE metal terminal block!

Terminal plan and connections • 9 3110086 EHC20 UK 160614

D.3 Hydraulic variants / overview / systems

Temperature sensorsExtra low voltage only

Relay connections230 VAC

Storage tan

k temp. 1

Storage tan

k temp. 2

Forward low

temperature

Flue tem

peratu

re

0-10 V sig

nal p

um

p

Circu

lator pu

mp

Three-w

ay valve

Hig

h tem

peratu

re mixer

valve

Low tem

peratu

re mixer

valve

Bypass d

amp

er

S1 S2 S3 S4 S5 S6 S7 S8 VFS1 VFS2 V1 V2R1

(ELR)R2

(ELR)R3 R4 R5 R6

R7(pot.-free)

Program 6.1.1

X X X X X

Program 6.1.2

X X X X X X X

Program 6.1.3

X X X X X X

Program 6.1.4

X X X X X X X X

Program 6.1.5

X X X X X X

Program 6.1.6

X X X X X X X X

Program 6.1.7

X X X X X X X X

10 • Terminal plan and connections 3110086 EHC20 UK 160614

Terminal plan and connections • 11 3110086 EHC20 UK 160614

Temperature sensorsExtra low voltage only

Relay connections230 VAC

Storage tan

k temp. 1

Storage tan

k temp. 2

Forward low

temperature

Flue tem

peratu

re

0-10 V sig

nal p

um

p

Circu

lator pu

mp

Three-w

ay valve

Hig

h tem

peratu

re mixer

valve

Low tem

peratu

re mixer

valve

Bypass d

amp

er

S1 S2 S3 S4 S5 S6 S7 S8 VFS1 VFS2 V1 V2R1

(ELR)R2

(ELR)R3 R4 R5 R6

R7(pot.-free)

Program 6.1.8

X X X X X X X X X

Program 6.1.1 with VFS-Sensor

(VFS-Sensor can be used with all systems )

X X X X X X

E. Connection diagrams

E.1 Program 6.1.1. Heat exchanger without bypass damper. With one storage tank.

Smoke gas temperature Forward flow

temperature

Storage tank temperature

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Ma

ins

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t

exodraft EHC10/EHC20 controller

PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2

Pump

U

-S3

U

-S8

U

-S1N L1

PE

1 111 12 2222 3 3 34 44 5

CGND GNDGND GNDGND GND GNDGNDGND GND

L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE

R1R2R3R4R5R6S1S2S3S4S5S6S7S8V1V2

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


0-1

0V

GN

D/0

V L N PE

0-1

0V

GN

D/0

V L N PE

This diagram shows the following system:

Heat exchanger without bypass damper. One storage tank and a 0-10 V regulated circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S1 temperature sensor must be mounted in the storage tank.

Important:

An STL thermostat which turns of the burner must be mounted on the forward low pipe. The forward low temperature must not exceed 100°C.

12 • Connection diagrams 3110086 EHC20 UK 160614

S3

R1

V1

S1

A1

S8

Connection diagrams • 133110086 EHC20 UK 160614

E.2 Program 6.1.2. Heat exchanger without bypass damper. With two storage tanks.

Smoke gas temperature

Sto

rage tank

tem

pera

ture

1

tem

pera

ture

2

Sto

rage tank

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


0-1

0V

GN

D/0

V L N PE

0-1

0V

GN

D/0

V L N PE

U

-S1

U

-S3

U

-S8

L1N

PE

L N PEL N PE

U

-S2

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Ma

ins

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2Pump 3-way valve

tem

pera

ture

Forw

ard

flo

w


Heat exchanger without bypass damper. Two storage tanks, a 3-way valve and a 0-10 V regulated circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S2 temperature sensor must be mounted in storage tank #2.The S1 temperature sensor must be mounted in storage tank #1.

Important:



S1

S3R1

S2

R3

A1

S8

V1


E.3 Program 6.1.3 Heat exchanger without bypass damper. With one storage tank and a mixer.


temperature

Storage tank

temperature

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


U

-S1

U

-S3

U

-S8

L1N

PE

CCWCW N CCWCW N L N PEL N PE

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Main

s

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2Mixer Pump


Heat exchanger without bypass damper. One storage tank, a mixer and a circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S1 temperature sensor must be mounted in the storage tank.The mixer should be controlled in such a way that R4 is enabled when the temperature in the forward low pipe needs to increase. R5 is enabled when the temperature needs to decrease.

Important:



S3

R1

S1

A1

S8

R4

R5


E.4 Program 6.1.4. Heat exchanger without bypass damper. With two storage tanks and a mixer.


Sto

rage tank

tem

pera

ture

1

tem

pera

ture

2

Sto

rage tank

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


CCWCW N CCWCW N L N PEL N PE

U

-S1

U

-S3

U

-S8

L1N

PE

L N PEL N PE

U

-S2

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Main

s

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2Mixer Pump3-way valve

tem

pera

ture

Forw

ard

flo

w


Heat exchanger without bypass damper. One storage tank, a mixer and a circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S2 temperature sensor must be mounted in storage tank #2.The S1 temperature sensor must be mounted in storage tank #1.The mixer should be controlled in such a way that R4 is enabled when the temperature in the forward low pipe needs to increase. R5 is enabled when the temperature needs to decrease.

Important:



S1

R1

S2

R3

A1

S8

R4

R5S3


E.5 Program 6.1.5. Heat exchanger with bypass damper. With one storage tank.


temperature

Storage tank

temperature

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


0-1

0V

GN

D/0

V L N PE

0-1

0V

GN

D/0

V L N PE

U

-S1

U

-S3

U

-S8

L1N

PE

L N PEL N PE

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Main

s

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2

PumpBypass


Heat exchanger with bypass damper. One storage tank and a 0-10 V regulated circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S1 temperature sensor must be mounted in the storage tank.R6 is enabled when the bypass damper is to switch to the non-bypass position.

Important:



S3

R1

S1

R6

A1

S8

V1


E.6 Program 6.1.6. Heat exchanger with bypass damper. With two storage tanks.


tem

pera

ture

Forw

ard

flo

w

Sto

rage tank

tem

pera

ture

1

tem

pera

ture

2

Sto

rage tank

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


0-1

0V

GN

D/0

V L N PE

0-1

0V

GN

D/0

V L N PEL N PEL N PE

U

-S1

U

-S2

U

-S3

U

-S8

L1N

PE

L N PEL N PE

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Main

s

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2Pump3-way valveBypass


Heat exchanger with bypass damper. Two storage tanks, a 3-way valve and a circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S2 temperature sensor must be mounted in storage tank #2.The S1 temperature sensor must be mounted in storage tank #1.R6 is enabled when the bypass damper is to switch to the non-bypass position.

Important:



S1

R1

S2

R3

R6

A1

S8

S3

V1


E.7 Program 6.1.7. Heat exchanger with bypass damper. With one storage tank and a mixer.

Blu

e

Bla

ck

Bro

wn


temperature

Storage tank

temperature

CCWCW N CCWCW NL N PEL N PE L N PEL N PE

U

-S1

U

-S3

U

-S8

L1N

PE

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


MixerBypass Pump

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Main

s

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2


Heat exchanger with bypass damper. One storage tank, a mixer and a circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S1 temperature sensor must be mounted in storage tank #1.The mixer should be controlled in such a way that R4 is enabled when the temperature in the forward low pipe needs to increase. R5 is enabled when the temperature needs to decrease.R6 is enabled when the bypass damper is to switch to the non-bypass position.

Important:



R1

S1

R6

A1

S8

R4

R5S3


E.8 Program 6.1.8. Heat exchanger with bypass damper. With two storage tanks and a mixer.


Sto

rage tank

tem

pera

ture

1

tem

pera

ture

2

Sto

rage tank

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


L N PEL N PE L N PEL N PE

U

-S1

U

-S2

U

-S3

U

-S8

L N PEL N PECCWCW N CCWCW N

Tem

pera

ture

sensor

input 8

VF

S2

se

nso

rs

VF

S1 s

en

so

rs

Ma

ins

0-1

0V

outp

ut

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2

Bypass 3-way valve PumpMixer

tem

pera

ture

Forw

ard

flo

w


Heat exchanger with bypass damper. Two storage tanks, a mixer, a 3-way valve and a circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S2 temperature sensor must be mounted in storage tank #2.The S1 temperature sensor must be mounted in storage tank #1.The mixer should be controlled in such a way that R4 is enabled when the temperature in the forward low pipe needs to increase. R5 is enabled when the temperature needs to decrease.R6 is enabled when the bypass damper is to switch to the non-bypass position.

Important:



S1

R1

S2

R3

R6

A1

S8

R4

R5S3


E.9 Program 6.1.1. Heat exchanger with VFS sensor for power measurement.


temperature

Storage tank

temperature

Tem

p.

Flo

w

0V

+5V

Tem

pera

ture

sensor

input 8

VF

S2 s

en

so

rs

VF

S1 s

en

so

rs

Main

s

0-1

0V

ou

tpu

t

0-1

0V

ou

tpu

t


PF

rela

y

Re

lay o

utp

ut

6

Re

lay o

utp

ut

1

RC

plu

gs

CA

N

CA

N

Tem

pera

ture

sensor

input 7

Tem

pera

ture

sensor

input 6

Tem

pera

ture

sensor

input 5

Tem

pera

ture

sensor

input 4

Tem

pera

ture

sensor

input 3

Tem

pera

ture

sensor

input 2

Tem

pera

ture

sensor

input 1

Re

lay o

utp

ut

5

Re

lay o

utp

ut

4

Re

lay o

utp

ut

3

Re

lay o

utp

ut

2

PumpVFS-Sensor

1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


1 111 12 2222 3 3 34 44 5


L

N NN

N

NNNNC NO

PE

PE

PE

PE

PE

PE

PE

PE


0-1

0V

GN

D/0

V L N PE

0-1

0V

GN

D/0

V L N PE1 2 3 41 2 3 4

U

-S3

U

-S3

U

-S8

L1N

PE


Heat exchanger with bypass damper. Two storage tanks, a mixer, a 3-way valve and a circulator pump.

The S8 temperature sensor must be positioned in the heat exchanger inlet.The S3 temperature sensor must be mounted on the forward low pipe immediately after the heat exchanger.The S1 temperature sensor must be mounted in storage tank #1.VFS sensor

Important:



R1

S1

R6

A1

S8

R4

R5

VFS

S3


F. Operation

F.1 Display and entry system

(1)

(2)

(4)

(3)

Example display symbols: Pump (rotates when operating)

Valve (direction of low in black)

Storage tank

Temperature sensor

Heat exchanger

Filling delay (see Filling time)

Warning / error message

New information

Logging enabled

Further symbols are used for the special functions

F.2 Setup wizard

After switching the controller on for the irst time and setting the language and time, you will be asked whether or not you would like to parametrise the controller with the help of the setup wizard. However, the setup wizard can be closed or launched again later on from the Special functions menu. The setup wizard guides you through the necessary basic settings in the correct order and provides brief descriptions of the various parameters in the display. Pressing the "esc" button takes you back to the previous value so that you can view the selected setting again and adjust it if necessary. Pressing the "esc" button more than once takes you back step by step to the selection mode, thus cancelling the setup wizard. You should now select "Manual" in the Operating mode menu

(page 34) in order to test the switch output with the load connected and check the sensor values for plausibility. You can then switch to automatic operation.

Observe the explanations of the individual parameters on the following pages, and check whether further settings are necessary for your application.

The display (1) with an extensive text and graphics mode makes the controller virtually self-explanatory in use.

To access the settings from the overview, press the "esc" button.

The green status LED (2) lights up as soon as a relay is connected; the red LED lashes in the event of an error message.

Entries are made using four buttons (3+4) which perform diferent functions depending on the situation. The "esc" button (3) is used to cancel an entry or exit a menu.

You may then be prompted to conirm that you wish to save your changes.

The functions of the other three buttons (4) are explained in the area of the display directly above the buttons. Generally speaking, however, the right-hand button is used to make and conirm selections.

Example button functions:

+/- = Increase / decrease values

ﾔ/ﾒ =Scrolldown/upinamenuYes/No =Conirm/cancelInfo =FurtherinformationBack =ReturntopreviousdisplayOK =ConirmselectionConirm =Conirmsetting

3110086 EHC20 UK 16061430 • Operation

F.3 Unassisted setup

If you decide not to use the setup wizard, you should make the necessary settings in the following order:

• Menu 9. Language, page 52• Menu 6.15 Time and date, page 51• Menu 6.1 Program selection, page 36• Menu 4. Settings, all values, page 34• Menu 5. Protective functions, if changes needed, page 35• Menu 6. Special functions, if further changes needed. page 36

You should now select "Manual" in the operation mode menu, page 34 in order to test the switch outputs with the load connected and check the sensor values for plausibility. You can then switch to automatic operation.

Observe the explanations of the individual parameters on the following pages, and check whether further settings are necessary for your application.

Exodraft recommends that you save the coniguration on the SD card after the setup.

To save the coniguration, you will need to use the "Save conig." function. This can be found in Menu 6.14 (Special functions/SD card).

F.4 Menu sequence and structure

The graphics or overview mode appears when no button has been pressed for two minutes or if the main menu is exited by pressing "esc".

Within this overview, you can scroll through the sensors and relays using the up and down buttons.

Menu sequence and structure • 313110086 EHC20 UK 160614

In graphics or overview mode, the esc button takes you straight to the main menu. The following items are then available to choose from:

Current temperature values with explanations

System function check with operating hours etc.

Automatic operation, manual operation or switch of device

Set parameters required for normal operation

Return cooling, anti-seize protection

Program selection, sensor calibration, clock, additional sensors etc.

Prevents accidental changes at critical points

For diagnostics in the event of an error

Select language

1. Measurements

2. Statistics

3. Operating mode

4. Settings

5. Protections

6. Special functions

7. Menu lock

8. Service data

9. Language

1. Measurements

The "1. Measurements" menu is used to display the temperatures currently measured.

The menu can be exited by pressing "esc" or selecting "Exit measurements".

If "--" appears in the display instead of the measurement, this indicates a defective or incorrect temperature sensor. If the cables are too long or the sensors are not positioned optimally, this can result in minor deviations in the measurements. In this case, the display values can be corrected by entering the relevant information into the controller. Follow the instructions under page 49. What measurements are displayed depends on the selected program, the sensors connected and the speciic device design.

32 • Menu sequence and structure 3110086 EHC20 UK 160614

2. Statistics

The "2. Statistics" menu is used for function control and long-term monitoring of the system.

The menu can be exited by pressing "esc" or selecting "Exit statistics".

In order to evaluate system data, the controller clock must be set correctly. Improper operation or an incorrect time may result in data being deleted, recorded incorrectly or overwritten. The manufacturer accepts no liability for the data recorded.

2.1 Operating hours

Shows the number of hours that the solar pump connected to the controller has been in operation. Various time ranges (day-years) are available.

2.2 Heat quantity

Shows the system's heat yield.

2.3 Graphic overview

The data set out under 2.1-2.2 are presented clearly in the form of a bar chart here. Various time ranges are available for comparison. You can scroll using the two buttons on the left.

2.4 Reports

Shows the last 20 system reports issued along with details of the date and time.

2.5 Reset / delete

Allows you to reset and delete individual statistics. If you select "All statistics", everything apart from the error list will be deleted.

3. Operating mode

In the "3. Operating mode" menu, you can not only select the automatic mode but also switch of the controller or switch to a manual operating mode. You can exit the menu by pressing "esc" or selecting "Exit statistics".


3.1 Automatic

Automatic mode is the normal mode of operation for the controller. Only in automatic mode can the controller function correctly, taking into account the current temperatures and the parameters set. If the power supply is interrupted, the controller will automatically return to the last selected operating mode.

3.2 Manual

The relay and therefore the loads connected are switched on or of at the push of a button, without taking into account the current temperatures and the parameters set. The temperatures measured are displayed for overview and function control purposes.

If the "Manual" operating mode is selected, the current temperatures and parameters selected no longer play any role. There is therefore a risk of scalding or serious damage to the system. The "Manual" operating mode should only be used by specialists for brief function tests or when setting up the controller.

3.3 Of

If the "Of" operating mode is enabled, all controller functions are switched of. This can cause the solar collector or other system components to overheat. The temperatures measured continue to be displayed for overview purposes.

4. Settings

In the "4. Settings" menu, you can conigure the basic settings for the control functions.

Under no circumstances are these settings designed as a substitute for the customer's own safety provisions!

You can exit the menu by pressing "esc" or selecting "Exit settings".

The menu numbering varies depending on the hydraulic schema chosen (see "6.1 Program selection", page 36 )

4.1 Tmin S (X)

Enable/switch-on temperature at sensor X If this value is exceeded at the speciied sensor and the other conditions are met, the controller will switch on the associated pump or valve. If the temperature at the sensor then drops 5°C below this value, the pump or valve will be switched of again.Setting range: 0°C to 99°C / default: 20°C

4.2 Tmax S (X)

Switch-of temperature at sensor XIf this value is exceeded at the speciied sensor, the controller will switch of the associated pump or valve. If this value is then undershot at the sensor and the other conditions are met, the controller will switch on the pump or valve again.Setting range: 0°C to 99°C / default: 60°C

Excessively high temperature settings can result in scalding or damage to the system. The customer must make provisions to prevent scalding.


4.3 Priority S(X)

Priority of the storage tank XThis setting speciies the illing order. If an equal priority is set, the storage tanks will be illed on an equal basis.Setting range: 1-4

4.4 T priority

Temperature threshold for absolute priority during primary illing

In multiple storage tank systems, the illing of a lower-ranking storage tank will not commence until the temperature setpoint at the sensor for the higher-ranking storage tank is exceeded.Setting range: 0°C to 90°C / default: 40°C

4.5 Filling time

Interrupting the illing of a lower-ranking storage tankWhen a lower-ranking storage tank is being illed, a check to determine whether the collector has reached a temperature level which would allow the higher-ranking storage tank to be illed is carried out after the period of time set here. If this is the case, the higher-ranking storage tank will be illed again.If this is not possible, the temperature rise will be measured (see "4.6 Temperature rise") in order to check whether the collector will shortly allow the higher-ranking storage tank to be illed.Setting range: 1 to 90 minutes / default: 20 minutes

4.6 Temperature rise

Extending the illing delay owing to temperature riseIn order to set the exact illing priorities for systems with multiple storage tanks, the minimum temperature rise at the collector (measured over a minute) which is needed in order for the delay in illing the lower-ranking storage tank to be extended by a minute is set. The delay is extended because the temperature rise at the collector will presumably soon allow the higher-ranking storage tank to be illed. The illing of the primary storage tank will begin as soon as ∆T switch-on conditions are met. If, however, the temperature rise undershoots the set value, the illing of the lower-ranking storage tank will once again be enabled.Setting range: 1°C to 10°C / default: 3°C

5. Protective functions

In the "5. Protective functions" menu, you can enable and conigure various protective functions.

Under no circumstances are these settings designed as a substitute for the customer's own safety provisions.

You can exit the menu by pressing "esc" or selecting "Exit protective functions".

5.1 Anti-seize protection

If anti-seize protection is enabled, the controller will switch on the relevant relay and the connected load for 5 seconds every day at 12 o' clock or every Sunday at 12 o' clock in order to prevent the pump or the valve seizing as a result of extended standstill periods.R1 setting range: daily, weekly, of / default: Of

R2 setting range: daily, weekly, of / default: Of


6. Special functions

In the "6. Special functions" menu, basic settings and advanced functions can be conigured.

With the exception of the time, the settings should only be conigured by specialists.

You can exit the menu by pressing "esc" or selecting "Exit special functions".

The menu numbering varies depending on the hydraulic schema chosen (see "6.1 Program selection")

6.1 Program selection

You can select and set the appropriate hydraulic variant for your particular application here (see Hydraulic variants / schemata / systems 10).Setting range: 1-48 / default: 1

Under normal circumstances, the program is selected once only when the specialist is setting up the controller. If an incorrect program is selected, this may lead to unexpected malfunctions.

6.2 Rotational speed control

If rotational speed control is enabled, a special internal electronic system in the EHC allows you to alter the rotational speed of pumps according to process requirements.

This function should only be enabled by a specialist. Depending on the pump and pump level used, the minimum rotational speed should not be set too low because the pump or the system could otherwise be damaged. The information provided by the relevant manufacturers must also be observed! In case of doubt, it is better to set the min. rotational speed and pump level too high rather than too low.

6.2.1 Rotational speed modes

The following rotational speed modes are available: Of: There is no rotational speed control. The pump connected is switched on at full speed or switched of.Mode 1: The controller switches to the set max. rotational speed after the purging period. If the temperature diference ∆T between the reference sensors (collector and storage tank) is below the set switch-on temperature diference ∆T R1, the rotational speed will be reduced. If the temperature diference between the reference sensors is above the set switch-on temperature diference ∆T R1, the rotational speed will be increased. If the controller has adjusted the rotational speed of the pump down to the lowest level and the ∆T between the reference sensors is ∆Tof, the pump is switched of.Mode 2: The controller switches to the set min. rotational speed after the purging period. If the temperature diference ∆T between the reference sensors (collector and storage tank) is above the set switch-on temperature diference ∆T R1, the rotational speed will be increased. If the temperature diference ∆T between the reference sensors is below the set switch-on temperature diference ∆T R1, the rotational speed will be reduced. If the controller has adjusted the rotational speed of the pump down to the lowest level and the ∆T between the reference sensors is ∆Tof, the pump is switched of.Mode 3: The controller switches to the set min. rotational speed after the purging period. If the temperature at the reference sensor (collector; in systems with heat exchanger for relay 2 the heat exchanger) is above the setpoint value to be set subsequently, the rotational speed will be increased. If the temperature at the reference sensor is below the setpoint value to be set subsequently, the rotational speed will be reduced.


Mode 4 (2 storage tank system)If the valve is set towards the higher-ranking storage tank, the rotational speed will be regulated as in M3. If the valve is set towards the lower-ranking storage tank, the rotational speed will be regulated as in M2.Setting range: M1, M2, M3, M4, of / default: of

6.2.2 Pump type

The type of speed-controlled pump should be set here.Standard: Rotational speed control via wave packet control for standard pumps.0-10 V: Control system for special pumps (e.g. high-eiciency pumps) using a 0-10 V signal. PWM: Control system for special pumps (e.g. high-eiciency pumps) using a PWM signal.

6.2.3 Pump settings

In this menu, you can conigure the settings for the 0-10 V or PWM pump.

If you select this menu, you may be prompted to save the rotational speed settings.

6.2.3.1 Pump

In this menu, you can select preset proiles for the pump or conigure all settings yourself under "Manual". The settings can also be changed after selecting a proile.

6.2.3.2 Signal form

In this menu, you can set the type of pump: Heating pumps are designed to set maximum power with a small input signal, while solar pumps provide low power from a small input signal. Solar = normal, heating = inverted.Setting range: Normal, inverted / default: Normal

6.2.3.3 PWM of

This signal is output when the pump is switched of (pumps with cable breakage detection require a minimal signal).Setting range: (Solar:) 0 to 50% / default: 0% - (Heating:) 50% to 100% / default: 100%

6.2.3.4 PWM on

The pump needs this signal in order to switch on and run at minimum speed.Setting range: (Solar:) 0 to 50% / default: 10% - (Heating:) 50% to 100% / default: 90%

6.2.3.5 PWM max

With this value, you can specify the maximum frequency for the highest speed of an energy-saving pump which will be used during purging or manual operation for example.Setting range: (Solar:) 50 to 100% / default: 100% - (Heating:) 0% to 50% / default: 0%

6.2.3.6 0-10V of

This voltage is output when the pump is switched of (pumps with cable breakage detection require a minimum voltage).Setting range: (Solar:) 0.0 to 5.0 V / default: 1.0 V - (Heating:) 5.0 to 0.0 V / default: 4.0 V

6.2.3.7 0-10V on

The pump needs this voltage in order to switch on.Setting range: (Solar:) 0.0 to 5.0 V / default: 1.0 V - (Heating:) 5.0 to 10.0 V / default: 9.0 V


6.2.3.8 0-10V max

With this value, you can specify the maximum voltage level for the highest speed of an energy-saving pump which will be used during purging or manual operation for example.Setting range: (Solar:) 5.0 to 10.0 V / default: 10.0 V - (Heating:) 0.0 to 5.0 V / default: 0.0 V

6.2.3.9 Rotational speed when "On"

In this menu, you can change the basis for calculating the rotational speed shown. If, for example, 30% is speciied here, 30% rotational speed will be shown when applying the frequency/voltage under "PWM On" / "0-10 V On". If the frequency/voltage for "PWM Max" / "0-10 V Max" is applied, 100% rotational speed will be shown. Intermediate values will be calculated accordingly.Setting range: 10 to 90% / default: 30%

This function does not inluence control functions. It merely inluences the display on the status screen.

6.2.3.10 Show signal

Shows the pump signal set in a graphical and text overview.

6.2.3a Example pump settings

Max rpm

Rotational speed

5-20% Stop

0-5% Cable Breakage detection

25% Start

25-90% Limits of regulation

Min rpm

PWM-Signal (%) 0 20% 25% 50% 100%

Stop

Start

5%

PWM out 5% - 20%

PWM in >=25% PWM max


6.2.3b Technical data – PWM and 0-10 V

PWM: 20% to 100%, 1 kHzDesigned for a 10 k ohm load resistance

PWM technical data:

0-10 V technical data:0-10 V: 2 V to 10 V (20% to 100%)Designed for a 10 k ohm load resistance.

10 V = 100% rotational speed5 V = 50% rotational speed2 V = 20% rotational speed0 V = Of

6.2.4 Purging time

During this time, the pump runs at full speed (100%) in order to ensure a reliable start-up. Only after this purging time will the pump run at a controlled speed and switch to the max. or min. speed depending on the mode set.The purging time cannot be used with 0-10 V / PWM pumps.Setting range: 5 to 600 seconds / default: 8 seconds

6.2.5 Control time

The control time is used to determine the latency of rotational speed control in order to minimise temperature luctuations. The time span required for a complete control cycle from minimum to maximum speed is speciied here.Setting range: 1 to 15 minutes / default: 4 minutes

6.2.6 Max. rotational speed

The maximum rotational speed of the pump is speciied here. During the setting procedure, the pump runs at the relevant speed and the throughlow can be determined.Setting range: 70% to 100% / default: 100%

If you select this menu, you may be prompted to save the rotational speed settings.

6.2.7 Min. rotational speed

The minimum rotational speed of the pump is speciied here. During the setting procedure, the pump runs at the relevant speed and the throughlow can be determined. Setting range: ("6.2.3.9 Rotational speed when "On", page 38) to max. rotational speed -5% / default: 30%

The percentages are guide values that may vary to a greater or lesser extent depending on the system, pump and pumping level. 100% is the maximum possible controller voltage/frequency.


6.2.8 Setpoint value

This value is the control setpoint value for Mode 3 (see "6.2.1 Rotational speed modes", page 36). If this value at the sensor drops below, the rotational speed will be reduced. If it is exceeded, the rotational speed will be increased.Setting range: 0°C to 90°C / default: 60°C

6.3 R2 rotational speed control

R2 rotational speed control - see "6.2 Rotational speed control", page 36

6.4 Relay functions

Free relays, i.e. relays not used in the basic schema, can be assigned the additional functions explained here. Each additional function can be used only once. R1 and R2: ELRs / electronically speed-controlled relaysR3 to R6: Mechanical relays 230 VR7: Potential-free relayV1 and V2: PWM and 0-10 V outputsPlease note the technical information for the relays (see page 5).

The symbols shown will be displayed on the overview screen as soon as you enable the function.

The numbering in this list does not correspond to the numbering in the controller menu.

6.4.1 Thermostat

Using the thermostat function, you can provide the system with additional energy on a time and temperature-controlled basis.Setting range: On, Of

Excessively high temperature settings can result in scalding or damage to the system.

The customer must make provisions to prevent scalding.

In economy mode, other values, e.g. T eco may apply.

6.4.1.1 TH setpoint

The target temperature at thermostat sensor 1. Below this temperature, the heating will switch on until TH setpoint+hysteresis is reached.Setting range: -20 - 99°C / default: 50°C

6.4.1.2 TH hysteresis

Hysteresis of the setpoint value.Setting range: 1 - 50°C / default: 10°C

6.4.1.3 Thermostat sensor 1

Tsetpoint is measured at thermostat sensor 1If thermostat sensor 2 is connected, the relay will switch on when the temperature drops below "TH setpoint" at thermostat sensor 1, and of when "TH setpoint" + hysteresis at thermostat sensor 2 is exceeded.Setting range: S1-S8, VFS1-2, Active storage tank / default: none


6.4.1.4 Thermostat sensor 2

Optional switch-of sensorIf "TH setpoint" + hysteresis at thermostat sensor 2 is exceeded, the relay will be switched of.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.1.5 T eco

Setpoint value in economy modeWhen in economy mode: During solar charging, the "T eco" value will be used instead of "TH setpoint" as the setpoint value. As soon as the temperature at thermostat sensor 1 drops below "T eco", the relay will be switched on and will heat until "T eco" + hysteresis is reached.Setting range: 0 - 99°C / default: 40°C

6.4.1.6 Storage tank

Economy modeCharging the storage tank selected here will enable the economy mode.If this storage tank is currently being run using solar, the heating will only be switched on if the temperature is below "T eco".Setting range: (Storage tank sensor) / default: First storage tank

6.4.1.7 Economy mode

In economy mode, the heating will only switch on when the temperature drops below the "T eco"-setting, and will heat to "T eco" + hysteresis if solar charging is enabled.Setting range: On, Of / default: Of

6.4.1.8 Times

Enable time for the thermostat functionYou can set the desired time periods during which the thermostat function is enabled from a time point of view here. You can enter three times for each day of the week. You can also copy individual days to other days. The thermostat function is switched of outside the set times.Setting range: 00:00 to 23:59 / default: 06:00 to 22:00

6.4.2 Thermostat 2

See "6.4.1 Thermostat", page 40

6.4.3 Cooling

With this function, an attempt is made to cool storage tanks for example to a variable setpoint temperature by releasing heat.Setting range: On, Of

6.4.3.1 Co Tsetpoint

The target temperature at thermostat sensor 1. Above this temperature, cooling will be switched on until Co Tsetpoint + hysteresis is reached.Setting range: 0 - 99°C / default: 50°C

6.4.3.2 Co hysteresis

If the temperature at the cooling sensor undershoots Tsetpoint + hysteresis, the relay will be switched of. Setting range: -50°C to -1°C / default: -10°C


6.4.3.3 Cooling sensor

The reference sensor for the cooling function.Setting range: S1-S8, VFS1-2, Active storage tank, RC / default: none

6.4.3.4 Times

Enable time for the cooling functionYou can set the desired time periods during which the cooling function is enabled from a time point of view here. You can enter three times for each day of the week. You can also copy individual days to other days. The cooling function is switched of outside the set times.Setting range: 00:00 to 23:59 / default: 06:00 to 22:00

6.4.4 Return low temperature rise

With this function, the return low temperature of a heating circuit can be increased with the help of the storage tank.Setting range: On, Of

6.4.4.1 RF Tmax

Maximum temperature at the storage tank sensor. If this temperature at the set storage tank sensor is exceeded, the relay will be switched of again.Setting range: 0 - 99°C / default: 70°C

6.4.4.2 ∆T return low

Switch-on temperature diferenceIf the temperature diference between the storage tank sensor and the return low sensor is exceeded, the relay will be switched on.Setting range: 5-20 K / default: 8 K

Switch-of temperature diference:

If the temperature diference between the storage tank sensor and the return low sensor is exceeded, the relay will be

switched of.

Setting range: 2-19 K (limited by ∆T storage tank RF On) / default: 4 K

6.4.4.3 Return low sensor

Return low sensor selectionSetting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.4.4 Storage tank sensor

Storage tank sensor selectionSetting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.5 Anti-Legionella function

With the help of the anti-Legionella function, you can heat up the system at selected times in order to eliminate Legionella bacteria.Setting range: On, Of

6.4.5.1 AL Tsetpoint

This temperature must be reached at the AL sensor(s) for the AL action time in order to allow successful heating.Setting range: 60 - 99°C / default: 70°C


6.4.5.2 AL action time

The AL Tsetpoint temperature at the AL sensors must prevail for this period of time in order to allow successful heating.Setting range: 1-120 min / default: 15 min

6.4.5.3 Last AL heating

Details of when the last successful heating took place are shown here.No setting options

6.4.5.4 AL sensor 1

The temperature for the AL function is measured by this sensor.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.5.5 AL sensor 2

Optional AL sensorIf this sensor is connected, Tsetpoint AL must be reached at both sensors for the action time in order to allow successful heating.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.5.6 AL times

AL heating will take place at these times.Setting range: 00:00 to 23:59 / default: 06:00 to 22:00

This anti-Legionella function does not ofer complete protection against Legionella because the controller relies on a suicient supply of energy and the temperatures cannot be monitored in the entire storage tank area and the connected pipe system. To ensure complete protection against Legionella, your energy sources must be able to heat the water to the necessary temperature, while your external control devices must ensure that the water is able to circulate within the storage tank and pipe system.

The anti-Legionella function is switched of as standard.

When the anti-Legionella function is enabled, the storage tank will be heated to above the "Tmax S2" value set, which can result in scalding and damage to the system.

6.4.6 Transfer

With this function, energy can be transferred from one storage tank to another.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.6.1 ∆ T transfer

Temperature diference for energy transfer. If the temperature diference between the sensors reaches ∆ T transfer on, the relay will be switched on. As soon as the diference drops to ∆ T transfer of, the relay will be switched of again.On: Setting range: 5-20°C/ default: 8°C

Of: Setting range: 2°C to ∆T on / default: 4°C


6.4.6.2 Tr Tmax

Setpoint temperature of the destination storage tankIf this temperature is measured at the sensor in the destination storage tank, the transfer function will be switched of.Setting range: 0-90°C / default: 60°C

6.4.6.3 Tr Tmin

Minimum temperature in the source storage tank to allow transferSetting range: 0-90°C / default: 30°C

6.4.6.4 Source sensor

In this menu, you can set the sensor that is positioned in the storage tank from which energy is withdrawn.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.6.5 Destination sensor

In this menu, you can set the sensor that is positioned in the storage tank to which energy is transferred.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.7 Diference

The relay is activated as soon as the set temperature diference between the source and destination sensor prevails.Setting range: On, Of

6.4.7.1 ∆ T diference

Switch-on diferenceThe relay will switch on when this temperature diference is reached.Setting range: 3-50°C / default: 10°C

Switch-of diferenceThe relay will switch of when this temperature diference is reached.Setting range: 2-49°C / default: 4 (the upper limit of the setting range is governed by the switch-on diference)

6.4.7.2 Source sensor

Heat source sensor/heat supplier for diferential functionSets the heat source sensor.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.7.3 Dif Tmin

Minimum temperature at the source sensor to activate the diferential relayIf the temperature at the source sensor is below this value, the diference function will not be switched on.Setting range: 0 to 90°C / default: 20°C

6.4.7.4 Destination sensor

Heat sink sensor/heat outlet for the diferential functionSets the heat outlet sensor.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.7.5 Dif Tmax

Maximum temperature at the destination sensor to activate the diferential relayIf the temperature at the destination sensor is above this value, the diference function will not be switched on.Setting range: 0 to 99°C / default: 60°C


6.4.8 Solid fuel boiler

The relay will be used to control an additional solid fuel boiler.Setting range: On, Of

6.4.8.1 SF Tmin

Minimum temperature in the boiler for switching on the pump. If the temperature at the boiler sensor is below this temperature, the relay will not be switched on.Setting range: 0°C to 99°C / default: 70°C

6.4.8.2 SF Tmax

Maximum temperature in the storage tank. If this is exceeded, the relay will be switched of.Setting range: Of up to 100°C / default: 70°C

6.4.8.3 ∆ T SF

The temperature diference between the boiler and storage tank as a switch-on and switch-of condition.Switch-on temperature diference ∆ T SFSetting range: 5 to 20 K / default: 8

Switch-of temperature diference ∆ T SFSetting range: 0°C up to switch-on ∆ T SF / default: 4

6.4.8.4 Boiler sensor

The sensor that is used as a boiler sensor.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.8.5 Storage tank sensor

The sensor that is used as a storage tank sensor.Setting range: S1-S8, VFS1-2, Active storage tank / default: none

6.4.9 Error messages

The relay will be switched on if one or more of the set conditions become active. This function can also be inverted so that the relay is switched on all the time (Permanently on) and then switched of when a protective function becomes active.Setting range: On, Inverted, Of / default: Of

Collector alarm

Collector protection

System protection

Frost protection

Return cooling

Anti-Legionella function

Reports


6.4.10 Pressure control

The relay switches on if the pressure drops below a minimum or exceeds a maximum.Setting range: On, Of / default: Of

6.4.10.1 Pressure control

In this menu, you can enable system pressure control via a direct sensor. As soon as the set pressure conditions are exceeded, the set relay will switch on.

6.4.10.2 RPS1 / RPS2

Pressure sensor modelIn this menu, you can set the type of pressure sensor used.Please note: If, for example, VFS1 is connected, RPS1 will be hidden.Setting range: Of; 0-0.6 bar; 0-1 bar; 0-1.6 bar; 0-2.5 bar; 0-4 bar; 0-6 bar; 0-10 bar

Default: Of

6.4.10.3 Pmin

Minimum pressure in the system. If this pressure drops below, the controller will issue an error message and the relay will switch (hysteresis: 0.5 bar).Setting range: Of; 0.0 to 10 bar

Default: Of

6.4.10.4 Pmax

Maximum pressure in the system. If this pressure is exceeded, the controller will issue an error message and the relay will switch (hysteresis: 0.5 bar).Setting range: Of; 0.0 to 10 bar

Default: Of

6.4.11 Booster pump

An additional pump which ills the system at the start of each solar charge.

6.4.11.1 Filling time

Duration of pump operationDetermines for how long the pump should ill the system after being triggered.Setting range: 0 - 120 seconds / default: 30 seconds

6.4.12 Parallel operation R (X)

The relay operates at the same time as the set relay R1 or R2. Setting range: On, Of


6.4.12.1 Delay

In this menu, you can specify how long after starting R1 or R2 the system waits until the relay operating in parallel starts.Setting range: 0 - 120 seconds / default: 30 seconds

6.4.12.2 Follow-up time

In this menu, you can specify how long the relay operating in parallel continues to run after R1 or R2 switches of.Setting range: 0 - 120 seconds / default: 30 seconds

6.4

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